<?php
// +----------------------------------------------------------------------
// | ThinkPHP [ WE CAN DO IT JUST THINK ]
// +----------------------------------------------------------------------
// | Copyright (c) 2006-2016 http://thinkphp.cn All rights reserved.
// +----------------------------------------------------------------------
// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
// +----------------------------------------------------------------------
// | Author: 流年 <liu21st@gmail.com>
// +----------------------------------------------------------------------

// 应用公共文件
function get_client_ip($type = 0,$adv=false) {
   $type       =  $type ? 1 : 0;
   static $ip  =   NULL;
   if ($ip !== NULL) return $ip[$type];
   if($adv){
       if (isset($_SERVER['HTTP_X_FORWARDED_FOR'])) {
           $arr    =   explode(',', $_SERVER['HTTP_X_FORWARDED_FOR']);
           $pos    =   array_search('unknown',$arr);
           if(false !== $pos) unset($arr[$pos]);
           $ip     =   trim($arr[0]);
       }elseif (isset($_SERVER['HTTP_CLIENT_IP'])) {
           $ip     =   $_SERVER['HTTP_CLIENT_IP'];
       }elseif (isset($_SERVER['REMOTE_ADDR'])) {
           $ip     =   $_SERVER['REMOTE_ADDR'];
       }
   }elseif (isset($_SERVER['REMOTE_ADDR'])) {
       $ip     =   $_SERVER['REMOTE_ADDR'];
   }
   // IP地址合法验证
   $long = sprintf("%u",ip2long($ip));
   $ip   = $long ? array($ip, $long) : array('0.0.0.0', 0);
   return $ip[$type];
}